This footage shows a Russian 9K22 Tunguska anti-aircraft weapon system going out of control as it during a recent exercise firing with real ammo. Miraculously, it was reported that nobody was harmed in the incident. Some people are speculating this was filmed in Crimea, but it could have been at the recent war games near Finland.
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Here's another angle from what it seems to be another armored vehicle. It shows how the fire hits it: